<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Document</title>
  <style>
    .container {
      width: 600px;
      height: 600px;
      display: flex;
      justify-content: center;
      align-items: center;
      border: 1px solid red;
    }

    .box1 {
      width: 440px;
      height: 440px;
      /*border-radius: 50%;*/
      /*background: radial-gradient(#a4eba3, white);*/
      background: radial-gradient( #a4eba3, rgb(255, 255, 255), rgb(255, 255, 255));
      display: flex;
      justify-content: center;
      align-items: center;
      /*background: radial-gradient(at 100px 100px, #a4eba3, white);   !* 圆心位置可以是像素值 *!*/
      /* background: radial-gradient(red,yellow,blue); */

    }

    /*.test {*/
    /*  width: 170px;*/
    /*  height: 170px;*/
    /*  border-radius: 50%;*/
    /*  background-color: #6fd862;*/
    /*  !*box-shadow:0 0 2px 2px #a4eba3 inset;*!*/
    /*}*/
  </style>
</head>
<body>
  <div class="container">
    <div class="box1">
      <div class="test">

      </div>
    </div>
  </div>

</body>
</html>
